[Bug 99173] Xorg waits for long time(200ms+) to invoke VT_RELDISP

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=99173

--- Comment #11 from Imre Deak <imre.deak at intel.com> ---
(In reply to zhang rui from comment #10)
> Created attachment 131408 [details]
> pm_console_suspend delay during suspend
> 
> Don't know what kind of info is needed.
> This problem can be reproduced on many platforms. here is the
> analyze_suspend output on Dell XPS 13 9360, which is a KBL platform, with
> 4.11 kernel.
> 
> As you can see in the ftrace output
>           python-2517  [003] d...   267.793000: pm_prepare_console_cal:
> (pm_prepare_console+0x0/0x40)
>           python-2517  [000] d...   268.065713: pm_prepare_console_ret:
> (pm_suspend+0x1dd/0x3a0 <- pm_prepare_console) arg1=0x0
> 
> this is the time cost by switching console during suspend.

Could you attach the dmesg starting from bootup booting with drm.debug=14? Also
is it possible to get a more detailed ftrace during suspend with i915 included
in the ftrace module list?

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